They help in finding and fixing bugs - tests can expose paths in the logic that were overlooked during implementation. Also an existing suite of tests should allow you to reproduce a found bug before fixing it.
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Моджтаба Хаменеи. Фото: Office Of The Iranian Supreme Leader / WANA (West Asia News Agency)/Handout via Reuters。业内人士推荐体育直播作为进阶阅读
从评级与排名可见，中国天楹规模实力（A级，第787名）、盈利能力（BBB级，第1173名）表现突出，位居市场中上游，业务体量与盈利转化效率具备明显优势；现金流量、资产质量（均为B级）处于市场中等水平；偿债能力、发展能力、资本结构、运营效率评级偏低，排名大幅靠后，是公司竞争力的主要短板。
Turbulence is rarely that simple. It’s too scattered, too mercurial, too easily triggered by weather patterns that trigger other patterns in an endless cascade. “It’s not just one thing that’s going on,” Bob Sharman, an atmospheric scientist at NCAR, told me. “It’s not just atmospheric convection. It’s not just wind flowing over mountains. It’s everything going on all the time and interacting.” Sharman is one of the country’s preëminent authorities on turbulence prediction. The computer models that he has built can predict where rough air is most likely to arise. “The problem is,” he said, “when we go to meetings with the airline industry and suggest a probabilistic approach, a pilot will stand up and say, ‘No! I want you to tell me if there will be turbulence at this place, at this time.’ ” Sharman threw up his hands. “Nobody knows that. I understand that, in theory, you would want that. But, in practice, that is just not possible.”